Actor Michelle Trachtenberg, known for her starring roles in Buffy the Vampire Slayer and Gossip Girl has died at the age of 39. Trachtenberg, who starred in a myriad of 90s and 2000s TV shows and movies,

Rosie O’Donnell, who starred alongside Trachtenberg in the starlet’s first movie, the Nickelodeon-produced 1996 film adaptation of the children’s novel “Harriet the Spy,” called the actress’ death “heartbreaking.”

Gossip Girl and Buffy The Vampire Slayer star Michelle Trachtenberg has tragically died at the age of 39 on Wednesday - with co-stars stepping forward to pay tribute to the actress

Michelle Trachtenberg’s boyfriend was seen at his LA house, hours after the “Gossip Girl” actress’ sudden death.

Michelle Trachtenberg’s Gossip Girl costars, Ed Westwick and Chace Crawford, are paying tribute to her after her sudden death at age 39. Trachtenberg — who played socialite Georgina Sparks on the hit CW series — was found dead on Wednesday,

O'Donnell, 62, played the nanny and confidant to Trachtenberg's clever kid detective in Harriet the Spy, which hit theaters in 1996 and marked Trachtenberg's first major film role. Until then, the young actress had been known for her work on TV's The Adventures of Pete & Pete and All My Children.

Michelle Trachtenberg's cause of death was ruled "undetermined" by the Office of Chief Medical Examiner in New York City, Fox News Digital confirmed.

Michelle Trachtenberg, a 2000s mainstay with memorable roles in " Gossip Girl ," "Harriet the Spy" and " Buffy the Vampire Slayer ," has died at 39.

Michelle Trachtenberg, an actress who starred in “Gossip Girl” and “Harriet the Spy,” was found dead in her luxury Midtown Manhattan apartment early Wednesday, police sources said. Trachtenberg, 39, was found unresponsive by her mother in her apartment near Columbus Circle at 8 a.m.

Hollywood heartthrobs Ed Westwick and Chace Crawford paid heartfelt tributes to their 'Gossip Girl' co-star Michelle Trachtenberg, after her tragic

Rosie O’Donnell has claimed that her former co-star Michelle Trachtenberg was “struggling” before her death.

Michelle Trachtenberg dead: Ice Princess and Gossip Girl actor was 39 Buffy the Vampire Slayer star sparked health concerns last year Rosie O’Donnell claims Harriet the Spy co-star Michelle Trac ...